“Ten Years Gone”… times three, plus two. And still insanely popular: There’s been very little Led Zeppelin activity in recent years; the aforementioned 2007 reunion show was the last time Robert Plant, Jimmy Page and John Paul Jones had done worked together.

After devising a clever Facebook campaign to count down to an unspecified event, the group announced that they’d finally release a live album of the one-night-only concert, which 20 million people reportedly applied for tickets for. To date, it’s been the last time that the surviving members of Zeppelin played together. However, they appeared together at press conferences in London and New York to promote the album. After the Celebration Day announcement came word that they would receive the prestigious Kennedy Center Honors award. All three showed up at the event, watching Kid Rock, Foo Fighters, Heart and Lenny Kravitz pay tribute. The following night, they appeared again, alongside fellow honoree David Letterman on Late Show.